20228506 has 8 divisors (see below), whose sum is σ = 30795840. Its totient is φ = 9963228.

The previous prime is 20228501. The next prime is 20228561. The reversal of 20228506 is 60582202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20228501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75346 + ... + 75613.

It is an arithmetic number, because the mean of its divisors is an integer number (3849480).

Almost surely, 2^20228506 is an apocalyptic number.

20228506 is a deficient number, since it is larger than the sum of its proper divisors (10567334).

20228506 is a wasteful number, since it uses less digits than its factorization.

20228506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151028.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 20228506 is about 4497.6111437073. The cubic root of 20228506 is about 272.4716172778.

The spelling of 20228506 in words is "twenty million, two hundred twenty-eight thousand, five hundred six".